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Control of regenerative braking in a hybrid vehicle

  • US 8,630,759 B2
  • Filed: 11/20/2009
  • Issued: 01/14/2014
  • Est. Priority Date: 11/20/2009
  • Status: Active Grant
First Claim
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1. A method for controlling regenerative braking in a hybrid electric vehicle having an energy-storage device, a motor/generator configured to receive energy from and supply energy to the energy-storage device, and to retard the vehicle via the regenerative braking, and a controller arranged to control the regenerative braking, the method comprising:

  • receiving a regenerative braking request;

    detecting whether the energy-storage device is between a first predetermined state of charge and a second predetermined state of charge, wherein the energy-storage device is configured to selectively store energy up to the first predetermined state of charge and release the stored energy down to the second predetermined state of charge;

    retarding the vehicle via the motor/generator and directing electrical energy from the regenerative braking to an energy dissipating device configured to dissipate energy from the regenerative braking when the energy-storage device is at or above the first predetermined state of charge and also when the energy-storage device is at or below the second predetermined state of charge; and

    retarding the vehicle via the motor/generator and directing electrical energy from the regenerative braking to the energy-storage device when the energy-storage device is between the first predetermined state of charge and the second predetermined state of charge.

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